Bicycle-pump.



Patented July 30, l90l.

M. F. ROCK.

BICYCLE PUMP.

(Application filed Jan. 12, 1901.)

3 Sheets-Sheet I.

(No Model.)

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N0. 679,5l2. Patented July 30, I90L M. F. ROCK.

BICYCLE PUMP.

(Application filed Jam. 12, 1901.)

(No Mode 3 Sheets-Sheet 2.

3n wntoz N0. 679,5l2. Patented July 30, l90l. M. F. ROCK.

BICYCLE PUMP.

Application filed Jan. 12, 1901.)

3 Sheets-Sheet 3.

(No Model.)

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UNTTED STATES PATENT OFFICE.

MELVIN F. BOOK, OF HOMER, NERV YORK.

BICYCLE-PUMP.

SPECIFICATION forming part of Letters Patent No. 679,512, dated July 30, 1901.

Application filed January. 12,1901. Serial No. 43,039. (No model.)

To ctZZ whom it may concern:

Be it known that I, MELVIN F. RooK, a citizen of the United States, residing at Homer, in the county of Cortland and State of New York,have invented new and useful Improvements in Bicycle-Pumps, of which the following is a specification.

This invention relates to pumps for inflating pneumatic tires on bicycles and other vehicles; and the object in View is to provide a pump which shall in effect form part of the machine, the said pump being carried by the machine-frame and for the most part housed within the seat-post tube, which in the present invention constitutes the pump-cylinder in which the pump-piston is adapted to reciprocate.

A bicycle-pump constructed in accordance with the present invention is entirely out of the way and concealed from view when not in use, is equal to any powerful foot-pump, and is easier to operate than the ordinary footpump by reason of the fact that the operator does not need to stoop or bend his back in operating the pump.

By means of the construction hereinafter described the slow and tedious process of in flating tires by means of the ordinary handpump is entirely done away with, and the pump is durable and simple in construction, always ready for use, does not take up valuable or extra space, and does not interfere with the strength of the bicycle-frame by reason of a portion of the frame being used as the pump-cylinder. The device is also extremely light in construction, adding Very little to the weight of the machine, and by reason of the particular arrangement of the pump within the frame it is unnecessary to lean the bicycle or other vehicle against a support in order to inflate the tires.

Other objects and advantages of the invention will be fully pointed out in the course of the ensuing description.

The invention consists in certain novel features and details of construction and arrangement of parts, as hereinafter fully described, illustratedin the drawings, andincorporated in the claims.

In the accompanying drawings, Figure l is a side elevation of a bicycle with parts thereof broken away in section to illustrate the nature of the present improvements. Fig. 2 is an enlarged vertical detail section through the upper portion of the seat-post tube, seatpost, and adjacent parts. Fig. 3is a detail sectional View of the seat -post detached, showing the hinged upper member thereof locked in riding position. Fig. i is a detail sectional View of the pump-handle, showing a portion of the piston rod or plunger. Fig. 5 is a detail section on the line so a: of Fig. 1.

Similar numerals of reference designate corresponding parts in the figures of the drawings.

Referring to the drawings for the purpose of illustrating the nature of the present inventi'on, I have shown the device applied to an ordinary safety-bicycle, in which 1 designates the seat-post tube, 2 the reach-bar or main tube, and 3 the wheels, said parts, together with the remainder of the machine, being constructed in the usual manner with the exception that in carrying out the present invention the lower end of the seat-post tube adjacent to the crank-hanger or bottom bracket is plugged, as indicated at 4:, to prevent the escape of air at that point, both ends of the reach-bar or main tube 2 being similarly plugged, as shown at 5, for the same purpose.

The seat-post tube 1 constitutes the pumpcylinder, and it communicates at its lower end with the reach-bar 2 by means of a tubular connection 6, in which is placed a check-valve 7, which will allow the air compressed within the pump-cylinder or seat-post tube to pass into the tube 2 and prevent its return. The connection 7 is also provided with a threaded nipple 8 to receive a flexible connecting-tube 9, one end of which is provided with a swivelhead 10 to fit the nipple 8, while the opposite end is provided with aright-angle connection 11, adapted to be fitted to the valve-casing 12 of one of the wheel-tires in a manner that will be readily understood.

At a point adjacent to the head of the machine the reach bar or main tube 2 is provided with a nipple 13, adapted to receive the flexible connecting-tube 9, so that the latter may be attached to the valve-casing of the front-wheel tire. If desired, two of the flexible connecting-tubes 9 may be employed, so that both tires may be simultaneously inwill go, the handle 25 being detached and inserted in the seat-post member 16 around the pump-stem and the saddle being rocked forward until the seat-post member 17 forces the parts inward and is caught and locked by the spring-actuated latch 32 in a manner readily understood.

I do not desire to be limited to the exact d etails of construction hereinabove described, but reserve the right to change, modify, or vary the construction within the scope of this invention.

I claim- 1. The combination with the seat-post tube of a bicycle; of a hollow seat-post mounted therein and comprising a pivoted upper horizontal member; a pump-piston mounted in the seat-post tube; a stem connected therewith and passing through the lower member of the seat-post; a detachable tubular handle surrounding the upper end of the stem; and a latch adapted to engage said handle and also look the upper horizontal member of the seat-post, substantially as described.

2. The combination with the seat-post tube of a bicycle; of a pump-piston and plunger mounted therein; a saddle post through which said stem passes; a tubular handle detachably mounted on said stem and inclosed by a saddle-post; and a latch cooperating with the handle for holding the handle and stem within the seat-post tube and the saddle-post, substantially as described.

3. The combination with the seat-post tube of a bicycle; of a hollow saddle-post mounted therein; a pump-piston mounted within the tube; a stem connected therewith and passing through the saddle-post a bushing in the lower end of the saddle-post; a finger-grip fast on the stem; and a spiral spring encircling the stem and interposed between the finger-grip and bushing, substantially as de scribed and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

MELVIN F. ROCK.

Witnesses:

ALBERT DILTHEY, A. L. CHURCHILL. 

